Nutrient accumulations and changes of exchangeable cation ions in soils under sunlight greenhouse vegetable cultivation 日光温室栽培对土壤养分累积及交换性养分含量和比例的影响
Experiments of different root zone temperature ( natural root temperature as ck , 15 , 20 , 25 , respectively ) were treated in blossom and fruit - set period in sunlight greenhouse 摘要通过对日光温室开花坐果期番茄根区不同温度处理（自然地温， 15 ， 20 ， 25 ） ，研究了低温季节根区温度对番茄生长的影响。
Based on the analysis , it raises the opinion that sunlight greenhouse is an important component of agriculture in hebei , and will be also the main form of facilities agriculture for a long time 通过分析，提出了发展河北省设施农业的看法，指出温室是河北省设施农业的重要组成部分，也是今后一段时期设施农业发展的主要形式。
The development of establishment vegetable was fast , and now the productions and technologies system which were associated with sunlight greenhouse , arching plastic canopy and other different forms and market system of establishment vegetable had been established primarily . these improved the periodic production of vegetable , poised the level of accommodation , reduced the seasonal difference of vegetable price and stabilized the income of peasant . the yield and production value of export vegetable of shandong increased steadily ; four export vegetable producing and processing area had been formed 针对目前我省蔬菜出口存在的问题,为了更大程度地促进我省农业和农村经济的发展,提高农民收入,扩大我省蔬菜的国际市场占有率,就必须以切实的行动,全省上下齐心协力,用先进的科学技术、先进的工艺设备和流程、先进的生产营销方式、脚踏实地的态度、开放的政策、严格规范的法律制度和生产标准,来改造和提高我省出口蔬菜的整体产业。
